Fix crash on closing dialogs in wrong order

When a menu dialog was closed when it still had an open file-browse
daughter, which could be done through the system menu X on the title
bar, later closing of the file browser caused a crash. This is solved by
keeping track of the fact that there is such a daughter through a global
flag, and ignoring the pop-down command if there is one.

diff --git a/xoptions.c b/xoptions.c
index 0689355..1bccfc3 100644 (file)
--- a/xoptions.c
+++ b/xoptions.c
@@ -624,6 +624,7 @@ int values[MAX_OPTIONS];
 ChessProgramState *currentCps;
 static Option *currentOption;
 extern Widget shells[];
+static Boolean browserUp;
 
 void CheckCallback(Widget ww, XtPointer data, XEvent *event, Boolean *b)
 {
@@ -659,6 +660,7 @@ void SpinCallback(w, client_data, call_data)
        XtSetArg(args[0], XtNstring, &q);
        XtGetValues(currentOption[data].handle, args, 1);
        for(r = ""; *q; q++) if(*q == '.') r = q; else if(*q == '/') r = ""; // last dot after last slash
+       browserUp = True;
        if(XsraSelFile(shells[0], currentOption[data].name, NULL, NULL, "", "", r,
                                  currentOption[data].type == PathName ? "p" : "f", NULL, &p)) {
                int len = strlen(p);
@@ -666,6 +668,7 @@ void SpinCallback(w, client_data, call_data)
                XtSetArg(args[0], XtNstring, p);
                XtSetValues(currentOption[data].handle, args, 1);
        }
+       browserUp = False;
        SetFocus(currentOption[data].handle, shells[0], (XEvent*) NULL, False);
        return;
     } else
@@ -785,6 +788,7 @@ void GenericPopDown(w, event, prms, nprms)
      Cardinal *nprms;
 {
     int n;
+    if(browserUp) return; // prevent closing dialog when it has an open file-browse daughter
     PopDown(prms[0][0] - '0');
 }